The lowest possible value for the index of refraction is:
A)0.
B)1.
C) /2.
D)1/ .

Question

The lowest possible value for the index of refraction is:
A)0. 
B)1. 
C) /2. 
D)1/ .

Quizplus · Accepted Answer

The index of refraction is defined as the ratio of the speed of light in vacuum to the speed of light in a medium. Since the speed of light in any medium cannot exceed the speed of light in vacuum (which is 1), the lowest possible value for the index of refraction is 1, which occurs in vacuum or air. Therefore, Option B is the correct answer.

The Lowest Possible Value for the Index of Refraction Is